●6-Inch Vinyl Face 130grams, 5/16”-24 Threads, fit mostly pneumatic sander ●Made of High-quality Vinyl, the life time is guaranteed ●Quality PolyUrethane molded, durable and heat-resistant to meet the toughest works ●Good balance ensure less vibration even at over12,000 rpm ●2pcs in a set, packed in a sturdy box to avoid being crushed during transportation